Standard Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method—Atmospheric)

SIGNIFICANCE AND USE
5.1 Vapor pressure is an important physical property of volatile liquids.  
5.2 Vapor pressure is critically important for both automotive and aviation gasolines, affecting starting, warm-up, and tendency to vapor lock with high operating temperatures or high altitudes. Maximum vapor pressure limits for gasoline are legally mandated in some areas as a measure of air pollution control.
SCOPE
1.1 This test method covers a procedure for the determination of total vapor pressure of petroleum products and liquid fuels using automatic vapor pressure instruments. The test method is suitable for testing samples with boiling points above 0 °C (32 °F) that exert a vapor pressure between 7 kPa and 110 kPa (1.0 psi and 16 psi) at 37.8 °C (100 °F) at a vapor-to-liquid ratio of 4:1. The test method is applicable to gasolines containing oxygenates. No account is made of dissolved water in the sample.  
Note 1: Because the external atmospheric pressure does not influence the resultant vapor pressure, this vapor pressure is an absolute pressure at 37.8 °C (100 °F) in kPa (psi). This vapor pressure differs from the true vapor pressure of the sample due to some small vaporization of the sample and dissolved air into the air of the confined space.  
1.1.1 Some gasoline-oxygenate blends may show a haze when cooled to 0 °C to 1 °C. If a haze is observed in 8.5, it shall be indicated in the reporting of results. The precision and bias statements for hazy samples have not been determined (see Note 6).  
1.2 This test method is a modification of Test Method D5191 (Mini Method) in which the test chamber is at atmospheric pressure prior to sample injection.  
1.3 This test method covers the use of automated vapor pressure instruments that perform measurements on liquid sample sizes in the range from 1 mL to 10 mL.  
1.4 This test method is suitable for the determination of the dry vapor pressure equivalent (DVPE) of gasoline and gasoline-oxygenate blends by means of a correlation equation (see 13.2). The calculated DVPE is considered equivalent to the result obtained on the same material when tested by Test Method D4953.  
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (For specific warning statements, see 7.2 through 7.7.)  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5482 − 20a
Standard Test Method for
Vapor Pressure of Petroleum Products and Liquid Fuels
1
(Mini Method—Atmospheric)
This standard is issued under the fixed designation D5482; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers a procedure for the determina-
responsibility of the user of this standard to establish appro-
tion of total vapor pressure of petroleum products and liquid
priate safety, health, and environmental practices and deter-
fuels using automatic vapor pressure instruments. The test
mine the applicability of regulatory limitations prior to use.
method is suitable for testing samples with boiling points
(For specific warning statements, see 7.2 through 7.7.)
above 0 °C (32 °F) that exert a vapor pressure between 7 kPa
1.7 This international standard was developed in accor-
and 110 kPa (1.0 psi and 16 psi) at 37.8 °C (100 °F) at a
dance with internationally recognized principles on standard-
vapor-to-liquid ratio of 4:1. The test method is applicable to
ization established in the Decision on Principles for the
gasolines containing oxygenates. No account is made of
Development of International Standards, Guides and Recom-
dissolved water in the sample.
mendations issued by the World Trade Organization Technical
NOTE 1—Because the external atmospheric pressure does not influence
Barriers to Trade (TBT) Committee.
the resultant vapor pressure, this vapor pressure is an absolute pressure at
37.8 °C (100 °F) in kPa (psi). This vapor pressure differs from the true
2. Referenced Documents
vaporpressureofthesampleduetosomesmallvaporizationofthesample
2
and dissolved air into the air of the confined space. 2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and
1.1.1 Some gasoline-oxygenate blends may show a haze
Petroleum Products
when cooled to 0 °C to 1 °C. If a haze is observed in 8.5,it
D4175 Terminology Relating to Petroleum Products, Liquid
shall be indicated in the reporting of results. The precision and
Fuels, and Lubricants
bias statements for hazy samples have not been determined
D4177 Practice for Automatic Sampling of Petroleum and
(see Note 6).
Petroleum Products
1.2 This test method is a modification of Test Method
D4306 Practice for Aviation Fuel Sample Containers for
D5191 (Mini Method) in which the test chamber is at atmo-
Tests Affected by Trace Contamination
spheric pressure prior to sample injection.
D4953 Test Method for Vapor Pressure of Gasoline and
1.3 This test method covers the use of automated vapor
Gasoline-Oxygenate Blends (Dry Method)
pressure instruments that perform measurements on liquid
D5190 Test Method for Vapor Pressure of Petroleum Prod-
3
sample sizes in the range from 1 mL to 10 mL.
ucts (Automatic Method) (Withdrawn 2012)
D5191 Test Method for Vapor Pressure of Petroleum Prod-
1.4 This test method is suitable for the determination of the
ucts and Liquid Fuels (Mini Method)
dry vapor pressure equivalent (DVPE) of gasoline and
D5842 Practice for Sampling and Handling of Fuels for
gasoline-oxygenate blends by means of a correlation equation
Volatility Measurement
(see 13.2). The calculated DVPE is considered equivalent to
D5854 Practice for Mixing and Handling of Liquid Samples
the result obtained on the same material when tested by Test
of Petroleum and Petroleum Products
Method D4953.
1.5 The values stated in SI units are to be regarded as the
3. Terminology
standard. The values given in parentheses are for information
3.1 Definitions:
only.
1 2
This test method is under the jurisdiction of ASTM Committee D02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee D02.08 on Volatility. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved July 1, 2020. Published July 2020. Originally approved the ASTM website.
3
in 1993. Last previous edition approved in 2020 as D5482 – 20. DOI: 10.1520/ The last approved version of this historical standard is referenced on
D5482-20A. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5482 − 20 D5482 − 20a
Standard Test Method for
Vapor Pressure of Petroleum Products and Liquid Fuels
1
(Mini Method—Atmospheric)
This standard is issued under the fixed designation D5482; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers a procedure for the determination of total vapor pressure of petroleum products and liquid fuels
using automatic vapor pressure instruments. The test method is suitable for testing samples with boiling points above 0 °C (32 °F)
that exert a vapor pressure between 7 kPa and 110 kPa (1.0 psi and 16 psi) at 37.8 °C (100 °F) at a vapor-to-liquid ratio of 4:1. The
test method is applicable to gasolines containing oxygenates. No account is made of dissolved water in the sample.
NOTE 1—Because the external atmospheric pressure does not influence the resultant vapor pressure, this vapor pressure is an absolute pressure at
37.8 °C (100 °F) in kPa (psi). This vapor pressure differs from the true vapor pressure of the sample due to some small vaporization of the sample and
dissolved air into the air of the confined space.
1.1.1 Some gasoline-oxygenate blends may show a haze when cooled to 0 °C to 1 °C. If a haze is observed in 8.5, it shall be
indicated in the reporting of results. The precision and bias statements for hazy samples have not been determined (see Note 6).
1.2 This test method is a modification of Test Method D5191 (Mini Method) in which the test chamber is at atmospheric
pressure prior to sample injection.
1.3 This test method covers the use of automated vapor pressure instruments that perform measurements on liquid sample sizes
in the range from 1 mL to 10 mL.
1.4 This test method is suitable for the determination of the dry vapor pressure equivalent (DVPE) of gasoline and
gasoline-oxygenate blends by means of a correlation equation (see 13.2). The calculated DVPE is considered equivalent to the
result obtained on the same material when tested by Test Method D4953.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. (For specific warning statements, see 7.2 through 7.7.)
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D4953 Test Method for Vapor Pressure of Gasoline and Gasoline-Oxygenate Blends (Dry Method)
3
D5190 Test Method for Vapor Pressure of Petroleum Products (Automatic Method) (Withdrawn 2012)
D5191 Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method)
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.08 on Volatility.
Current edition approved May 1, 2020July 1, 2020. Published May 2020July 2020. Originally approved in 1993. Last previous edition approved in 20132020 as
D5482 – 07 (2013).D5482 – 20. DOI: 10.1520/D5482-20.10.1520/D5482-20A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, P
...

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